Ontario Building Codes -

Leo shrugged. “Grandma doesn’t like steps.”

The property sat just thirty meters from the Grand River. According to , specifically Section 9.13 – Dampproofing and Waterproofing and Section 9.14 – Drainage , any foundation within a designated flood fringe required a minimum elevation of 600 mm above the regulatory flood elevation. Leo didn’t check the local conservation authority’s floodplain maps. He poured a concrete slab at grade. ontario building codes

Three weeks into framing, inspector Mira Sharma arrived. Mira knew the OBC by heart—not just the tables, but the intent. She carried a well-worn copy of , which governs flood-resistant construction. She knelt by the sill plate and measured from the finished ground level to the top of the foundation. “Leo,” she said quietly, “you’re at 150 mm above grade. The Code requires 600 mm in this zone. And where’s your backwater valve?” Leo shrugged